<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script type="text/javascript" src="./js/vue.js"></script>
</head>
<body>
    <div id="app">
        <button v-on:click="getRandom">获取随机数</button>
        <div>生成的随机数是:{{num}}</div>
    </div>
</body>
<script>
        const vm=new Vue({
            el:'#app',
            data:{
                num:0
            },
            methods: {
                getRandom(){
                    console.log(this);
                    this.num=Math.floor(Math.random()*10);
                }
            }
        })
</script>
</html>